JPS587961B2 - Tape fiber - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a synthetic resin or rubber clad tape (ribbon) fiber, which is not particularly long, but may be used, for example, as a light guide for light emitted from a spectrometer.
The present invention relates to a method of manufacturing a short, constant length tape-shaped optical fiber.

The present invention is characterized in that a thin layer of synthetic resin or rubber with a relatively low refractive index is formed on the cylindrical surface of the fiber winding bobbin, and a fiber with a higher refractive index than the thin layer is formed on the thin layer of synthetic resin or rubber with a relatively low refractive index. The core is wound up, and a thin layer of the same synthetic resin or rubber as described above is further formed on it, and this is integrated with the thin layer to form a cladding layer, and after this, a fiber including the cladding layer is formed. The core row is cut in a direction substantially perpendicular to its length and stripped from the bobbin to produce a tape fiber having a length equal to the circumferential length of the cylindrical portion of the bobbin.

Thus, a tape fiber can be obtained in which multiple fiber cores are coated with a common cladding layer.

Next, examples will be described.

(1) As shown in Fig. 1, liquid synthetic resin (fluororesin desversion, etc.) or rubber paint (silicone rubber) is applied to the cylindrical surface 1a of the bobbin 1, and heat treated to form a thin layer 11a. form.

Note that the refractive index of this thin layer 11a is lower than that of the fiber core described later.

(2) A fiber core 12 having a higher refractive index than this layer 11a is wound onto this layer 11a (Fig. 2). At this time, the winding pitch of the fiber core 12 is varied from aligned winding to gap winding and lap winding. Adjust as necessary.

In FIG. 2, 12a is a glass iron for the core, 2 is a heating furnace, and 3 is a winding pulley.

(3) Next, the same liquid synthetic resin or rubber coating as used to form the thin layer 11a is applied onto the wound fiber core 12 and cured by heat treatment to form the thin layer 11b (Fig. 3). ).

This thin layer 11b is removed during the heat treatment.
1a and the cladding layer 11 of the fiber core 12.
Configure.

(4) Next, the row of fiber cores 12 including the cladding layer 11 is cut with a sharp knife in a direction substantially perpendicular to its length direction;
Gently peel off the skin from the cut point (Figure 4)
.

(5) Then, a tape fiber 10 having the circumferential length of the bobbin cylindrical surface 1a is completed (FIG. 5).

The effects of the present invention are as follows.

(1) Since a large number of fiber cores are coated with a common cladding layer, the space factor is high and a high-density tape fiber can be used.

(2) The method of covering a large number of fiber cores with a common cladding layer simplifies the manufacturing process and facilitates tandem production.

(3) Since the fiber core is solid, it is possible to wind it in alignment on the winding bobbin, and since the cores can be kept at a predetermined interval, there is no risk of crosstalk even if the cladding layer is common.

[Brief explanation of drawings]

1 to 4 are explanatory diagrams sequentially showing examples of the manufacturing method of the present invention, and FIG. 5 is a perspective view of the manufactured tape fiber. 1... Winding bobbin, 10... Tape fiber, 11... Clad layer, 12...
...Fiber core.

Claims (1)

[Claims] 1. A thin layer 11a of synthetic resin or rubber with a relatively low refractive index is formed on the cylindrical surface 1a of the winding bobbin 1, and a fiber core 12 with a higher refractive index than the thin layer 11a is formed thereon.
A thin layer 1lb of the same synthetic resin or rubber as the thin layer 11a is formed on the wound fiber core 12, and this is integrated with the thin layer 11a to form the cladding layer 11, and then the cladding layer 11 is formed. A method for manufacturing synthetic resin or rubber clad tape fibers, which comprises cutting a row of optical fibers 12 including layers 11 in a direction substantially perpendicular to their length and stripping them from a bobbin 1.